Heap-based buffer overflow in freetype (Alpine package)

1) Heap-based buffer overflow

EUVDB-ID: #VU47741

Risk: Critical

CVSSv4.0: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Red]

CVE-ID: CVE-2020-15999

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in freetype library when processing TTF files. A remote attacker can pass specially crafted TTF file with PNG sbit glyphs to the application, trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Note, this vulnerability is being actively exploited in the wild.

Mitigation

Install update from vendor's website.

Vulnerable software versions

freetype (Alpine package): 2.3.8-r0 - 2.10.4-r0

CPE2.3

• cpe:2.3:o:alpine:freetype_alpine_package:2.3.8-r0:*:*:*:*:alpine_linux:*:1.9
• cpe:2.3:o:alpine:freetype_alpine_package:2.4.2-r0:*:*:*:*:alpine_linux:*:2.0
• cpe:2.3:o:alpine:freetype_alpine_package:2.4.3-r0:*:*:*:*:alpine_linux:*:2.1

External links

https://git.alpinelinux.org/aports/commit/?id=d435959ada011bdf44a535aa1297ad86d0f0f235

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.